CN111648375B - Inner supporting structure based on shear wall as support - Google Patents
Inner supporting structure based on shear wall as support Download PDFInfo
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- CN111648375B CN111648375B CN202010524586.7A CN202010524586A CN111648375B CN 111648375 B CN111648375 B CN 111648375B CN 202010524586 A CN202010524586 A CN 202010524586A CN 111648375 B CN111648375 B CN 111648375B
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 94
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 230000002787 reinforcement Effects 0.000 claims description 29
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to an internal support structure based on a shear wall as a support, which comprises a support wall built along the side wall of a foundation pit, wherein a plurality of groups of shear walls are vertically arranged in the foundation pit, each shear wall comprises at least three groups of secant piles which are meshed in sequence, the axes of the secant piles of the same group of shear walls are coplanar, and the plane is vertical to the support wall; the top end of the support wall is poured with a crown beam, a waist beam is fixed on one side of the support wall facing the interior of the foundation pit along the height direction, and a support beam horizontally arranged is connected between the shear wall and the crown beam as well as between the shear wall and the waist beam. By adopting the technical scheme, the distance between the shear wall and the supporting wall can be adjusted to be closer, so that the supporting beam is shorter in length, smaller in center bending moment, convenient to pour and support the supporting wall, and capable of supporting the side wall of the foundation pit in the wide foundation pit, and lower in cost.
Description
Technical Field
The invention relates to the technical field of foundation pit supporting, in particular to an inner supporting structure based on a shear wall as a support.
Background
At present, with the rapid development of the national novel urbanization construction, the deep foundation pit becomes an important component part of building engineering, municipal engineering, rail traffic engineering and the like. In order to ensure the safety of the construction of the underground structure and the surrounding environment of the foundation pit, the supporting, reinforcing and protecting measures are adopted for the side wall of the foundation pit and the surrounding environment, and the mode is called as foundation pit supporting.
The existing foundation pit support has various forms, including slope setting, soil nail support, anchor spraying support, pile anchor support, wall anchor support, steel sheet pile support, underground continuous wall support and the like, and the combination of more than one of the support forms. Along with more and more foundation ditch engineering construction receives the restriction of site conditions, the double row pile is as a comparatively neotype support pattern, and its supporting construction rigidity greatly increased is strutted because of similar rigid frame structure effect principle, has great promotion than traditional single row pile support performance, consequently the double row pile can be popularized and applied at home gradually. During excavation of a foundation pit with a small width, the two opposite side supporting structures are often connected and supported through pouring a horizontal temporary supporting beam in the foundation pit, so that the effect of continuously supporting the side wall of the foundation pit is realized, and during construction in the foundation pit with a large width, the supporting beam is supported in a non-through mode.
The above prior art solutions have the following drawbacks: if the great foundation ditch of width adopts double row pile to strut, can reduce the temporary support beam construction cost of large-span, but the pile bolck crown beam elevation of double row pile is unanimous almost with foundation ditch top elevation, and required pile length is longer, and the cost is higher. And unnecessary waste is caused because the double rows of piles are non-recyclable materials. Therefore, there is room for improvement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the inner support structure based on the shear wall as the support, which has the effect of supporting the side wall of the foundation pit in the wide foundation pit and is low in cost.
The above object of the present invention is achieved by the following technical solutions:
an inner support structure based on a shear wall as a support comprises a support wall built along the side wall of a foundation pit, wherein a plurality of groups of shear walls are vertically arranged in the foundation pit, each shear wall comprises at least three groups of secant piles which are meshed in sequence, the axes of the secant piles of the same group of shear walls are coplanar, and the plane is perpendicular to the support wall; the top end of the supporting wall is poured with a crown beam, a waist beam is fixed on one side of the supporting wall facing the inside of the foundation pit along the height direction, and a supporting beam arranged horizontally is connected between the shear wall and the crown beam and between the shear wall and the waist beam.
By adopting the technical scheme, the supporting wall can be built by rotary excavating cast-in-place piles, underground continuous walls and the like, the conventional foundation pit supporting can be carried out by an anchor rod anchoring mode, but if other construction sites or buildings are arranged outside the foundation pit, the anchoring can not be carried out by the anchor rod, so that the supporting mode of the supporting beam is necessary, but the supporting beam with large span is often large in central bending moment and easy to collapse. The shear wall in this scheme comprises at least three groups of secant piles that interlock in proper order to the plane at the central axis place of each secant pile is perpendicular with a supporting wall, thereby plays the effect of supporting to a supporting beam, has better anti horizontal thrust and the effect of shearing. If the supporting wall is composed of a plurality of supporting piles, the supporting piles can be connected into a whole through the crown beams and the waist beams, and therefore stress among the supporting piles is uniform under the action of the supporting beams. Because the distance between the shear wall and the supporting wall can be adjusted to be closer, the supporting beam is shorter in length, the center bending moment is smaller, pouring and supporting of the supporting wall are facilitated, the effect of supporting the side wall of the foundation pit in the wide foundation pit is achieved, and the cost is lower.
The present invention in a preferred example may be further configured to: and one side of the secant pile close to the supporting wall, which faces the supporting wall, is pre-embedded with a connecting steel box, and the steel bars of the supporting beam are connected with the connecting steel box.
By adopting the technical scheme, the connecting steel boxes are pre-buried in the middle of the secant pile close to the supporting wall, the connecting steel boxes can be dug out when a supporting beam is poured, and reinforcing steel bars of the supporting beam are welded with the connecting steel boxes and then poured with concrete to form the supporting beam, so that the connecting relation between the supporting beam and the shear wall is more stable, and the supporting effect on the supporting wall is favorably improved.
The present invention in a preferred example may be further configured to: the distances between the shear walls and the supporting walls are equal, and the shear walls are arranged at equal intervals.
Through adopting above-mentioned technical scheme, set up the distance between shear force wall and the buttress wall to equal to make each group's a supporting beam's length equal, be convenient for pour and intensity unanimous, be difficult to appear local weak point at the in-process of strutting. The equal distance among the shear walls is beneficial to ensuring that the supporting force received by the supporting wall from the supporting beam is more even.
The present invention in a preferred example may be further configured to: the shear wall is fixedly sleeved in the height direction with a plurality of reinforcing hoops, and the reinforcing hoops are attached to the outer peripheral surface of the shear wall.
By adopting the technical scheme, the shear wall is fixedly sleeved along the height direction with the plurality of reinforcing hoops, and the individual secant piles of the single shear wall are tightly held by the reinforcing hoops, so that the connection strength between the secant piles in the shear wall is further improved, and the shear resistance and the bending resistance of the shear wall are further improved.
The present invention in a preferred example may be further configured to: the shear wall comprises two groups of first occlusive piles and a second occlusive pile which is located between the two groups of first occlusive piles and occluded with the two groups of first occlusive piles, a first reinforcement cage is buried in the first occlusive piles, the first reinforcement cage is close to one side of the second occlusive pile, which is sunken in the axial direction, is provided with a notch angle, and the projection of the first occlusive piles on the horizontal plane is coincided with the projection of the notch angle.
Through adopting above-mentioned technical scheme, because the second secant pile need with the partial excision of adjacent first secant pile coincidence when with the interlock of first secant pile, consequently bury the first steel reinforcement cage that has the unfilled corner in with first secant pile underground, can not bump with the steel reinforcement cage when carrying out the partial excision to first secant pile, the setting of first steel reinforcement cage has also further improved the structural strength and the bending strength of first secant pile simultaneously, and then has improved the stability that supports a retaining wall.
The present invention in a preferred example may be further configured to: the connecting steel box is fixed with the first steel reinforcement cage.
Through adopting above-mentioned technical scheme, will connect steel box and first steel reinforcement cage fixed and then improved the joint strength who connects between box just and the first secant pile that is close to a retaining wall to reduce the condition of support in-process structural failure.
The present invention in a preferred example may be further configured to: the connecting steel box is provided with an inserting groove vertically towards one side of the supporting wall, the inserting groove is provided with a limiting groove parallel to the inserting groove in the length direction along two side walls in the length direction, two ends of the inserting groove and the limiting groove are sealed, and the top ends of the inserting groove and the limiting groove are provided with openings towards the supporting wall.
Through adopting above-mentioned technical scheme, connect just inserting groove, the spacing groove top of box and seted up the opening, the opening is used for supplying a supporting beam's reinforcing bar to insert, through buckling into the tip with the reinforcing bar with spacing groove complex L type to can carry on spacingly to the reinforcing bar through the spacing groove, make a supporting beam difficult follow reinforcing bar when pouring
The present invention in a preferred example may be further configured to: the reinforcing hoops comprise two groups of half hoops, and the two groups of half hoops are symmetrically arranged along the plane where the axis of the secant pile of the same shear wall is located.
Through adopting above-mentioned technical scheme, through setting up the reinforcement hoop into the half hoop of interconnect of two sets of shape structure symmetries to at the in-process of excavation downwards of foundation ditch, the reinforcement hoop on shear force wall top has fixed connection, also can cup joint fixed reinforcement hoop along with the part that the shear force wall exposes downwards, thereby makes the shear force wall keep a whole from top to bottom, is favorable to improving the bulk strength of shear force wall.
The present invention in a preferred example may be further configured to: two ends of the two groups of half hoops in the horizontal direction extend out of two ends of the shear wall in the horizontal direction and are connected with split bolts together.
Through adopting above-mentioned technical scheme, realize holding tightly through connecting the split bolt between two sets of half hoops to joint strength and the convenience of connecting have been improved.
In conclusion, the invention has the following beneficial effects:
1. the shear wall close to the support wall is arranged in the foundation pit, and the support beam is connected between the shear wall and the support wall, so that the support beam is short in length and small in center bending moment, pouring and support for the support wall are facilitated, the effect of supporting the side wall of the foundation pit in the wide foundation pit is achieved, and the cost is low;
2. the shear wall is formed by meshing three groups of secant piles, and the shear wall is externally sleeved and fixed with the reinforcing hoops, so that the connection relation and integrity among the three groups of secant piles are increased, the shear wall is improved in shear resistance and bending resistance, and the supporting effect of the supporting beams on the supporting wall is more stable;
3. through burying the first steel reinforcement cage that has the breach underground in first secant pile, both improved the shear bending strength of first secant pile, can be used for again with connect steel box fixed connection to when pouring first secant pile, the position of connecting the steel box is confirmed easily and is difficult for the come-up, connect the steel box be used for with a supporting beam in the embedded steel bar be connected, further improve the relation of being connected between a supporting beam and the shear force wall.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
fig. 2 is a schematic structural view of a first reinforcement cage and a second reinforcement cage in the present embodiment;
fig. 3 is an enlarged view of a portion a in fig. 2.
Reference numerals: 1. supporting a protecting wall; 11. a crown beam; 12. a wale; 2. a shear wall; 21. a first occlusive pile; 211. a first reinforcement cage; 212. unfilled corners; 22. a second occlusive pile; 221. a second reinforcement cage; 23. connecting the steel boxes; 231. inserting grooves; 232. a limiting groove; 233. an opening; 3. a support beam; 4. a reinforcing hoop; 41. half hoops; 42. and (4) oppositely pulling the bolts.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the internal support structure based on a shear wall 2 as a support comprises a supporting wall 1 built along the side wall of a foundation pit, wherein the supporting wall 1 can be an underground continuous wall, supporting piles arranged side by side and the like, a top beam 11 is cast at the top end of the supporting wall 1 along the length direction of the supporting wall 1, a plurality of waist beams 12 are fixed on one side of the supporting wall 1 facing the inside of the foundation pit along the height direction, and the length direction of the waist beams 12 is parallel to the length direction of the top beam 11.
A plurality of groups of shear walls 2 are vertically arranged in the foundation pit, the distances between the shear walls 2 and the supporting walls 1 are equal, and the shear walls 2 are arranged at equal intervals. The shear wall 2 comprises at least three groups of interlocking piles which are engaged in sequence, and the shear wall 2 formed by the three groups of interlocking piles is specifically described in the embodiment. The axial line coplane of each secant pile of the same shear wall 2 and this plane is perpendicular with a retaining wall 1, shear wall 2 includes two sets of first secant pile 21 and is located between two sets of first secant pile 21 and with the second secant pile 22 of two sets of first secant pile 21 interlock, first steel reinforcement cage 211 has been buried underground in the first secant pile 21, a side direction axial direction that first steel reinforcement cage 211 is close to second secant pile 22 is sunken to have unfilled corner 212, the projection of first secant pile 21 on the horizontal plane and the projection coincidence of unfilled corner 212, bury the complete second steel reinforcement cage 221 of circumference in the first secant pile 21. The second spud 22 is cast by cutting off the portion of the first spud 21 coinciding with the projection plane of the second spud 22, so that the use of the unfilled corner 212 of the second reinforcement cage 221 facilitates the partial cutting off of the first spud 21. The arrangement of the first reinforcement cage 211 and the second reinforcement cage 221 is beneficial to improving the shearing resistance and bending resistance of the first occlusive pile 21 and the second occlusive pile 22, and further improving the shearing resistance and bending resistance of the whole shear wall 2.
The secant pile close to the supporting wall 1, namely the first secant pile 21, is embedded with a connecting steel box on one side facing the supporting wall 1, and the connecting steel box is fixed with the first reinforcement cage 211. Connect just box one side of orientation support wall 1 and vertically seted up inserting groove 231, inserting groove 231 all sets up the spacing groove 232 that length direction is parallel with inserting groove 231 along length direction's both sides wall, and the both ends of inserting groove 231 and spacing groove 232 are sealed, and opening 233 has been seted up towards the orientation of support wall 1 to the top of inserting groove 231 and spacing groove 232.
A supporting beam 3 which is horizontally arranged is connected between the shear wall 2 and the crown beam 11 and the waist beam 12, reinforcing steel bars are embedded in the supporting beam 3, and the reinforcing steel bars of the supporting beam 3 are welded with the connecting steel box. Wherein the reinforcing bar in the supporting beam 3 is buckled for the L type towards the one end of shear force wall 2 to the reinforcing bar in the supporting beam 3 gets into and with spacing groove 232 joint from the opening 233 of connecting steel box 23 earlier before building supporting beam 3, carries out spacing through spacing groove 232 to the L type of reinforcing bar tip.
The shear wall 2 is fixedly sleeved with a plurality of reinforcing hoops 4 along the height direction, the reinforcing hoops 4 are attached to the outer peripheral surface of the shear wall 2, and the reinforcing hoops 4 are located below the supporting beams 3. The reinforcing hoops 4 comprise two groups of half hoops 41, and the two groups of half hoops 41 are symmetrically arranged along the plane of the secant pile axis of the same shear wall 2. The two ends of the horizontal direction of the half hoops 41 extend out of the two ends of the horizontal direction of the shear wall 2 and are connected with the split bolts 42 together, and the two groups of the half hoops 41 are fixed through the split bolts 42, so that the exposed part of the shear wall 2 is deeper and deeper along with excavation of a foundation pit, and a new reinforcing hoop 4 can be continuously sleeved and fixed on the shear wall 2, so that the connectivity and the stability between the secant piles are further improved.
The implementation principle of the embodiment is as follows:
when the internal support structure based on the shear wall 2 as the support is built, the method comprises the following steps:
the method comprises the following steps: excavating and pouring the shear wall 2, firstly excavating and pouring two groups of first secant piles 21 which are spaced at a certain distance, embedding a first steel reinforcement cage 211 with unfilled corners 212 in the first secant pile 21, wherein the unfilled corners 212 of the two groups of first steel reinforcement cages 211 are arranged oppositely, a plurality of connecting steel boxes 23 are fixed in the height direction of the first steel reinforcement cage 211 close to the supporting wall 1, then excavating and pouring a second secant pile 22 between the two groups of first secant piles 21, wherein the second secant pile 22 is occluded with the two groups of first secant piles 21, and a full-circle first steel reinforcement cage 211 is embedded in the second secant pile 22;
step two: excavating a foundation pit, and building a crown beam 11 and a waist beam 12 on the supporting wall 1;
step three: cutting the connecting steel box 23, bending the reinforcing steel bars of the support beam 3, then entering the opening 233, placing the reinforcing steel bars in the insertion groove 231 and the limiting groove 232, and then pouring the support beam 3;
step four: a reinforcing hoop 4 is sleeved;
step five: and continuously excavating the foundation pit and repeating the third step to the fourth step until the foundation pit is excavated to the preset depth.
When the first occlusive pile 21 is poured, foam or paper and the like can be filled in the inserting groove 231, the limiting groove 232 and the opening 233 of the connecting steel box 23, so that cement is prevented from entering and blocking.
Through set up in the foundation ditch with the shear force wall 2 that the distance between the retaining wall 1 is close, through connecting a supporting beam 3 between shear force wall 2 and the retaining wall 1 for supporting beam 3's length is shorter, and the centre bending moment is less, is convenient for pour and supports retaining wall 1, plays the effect of strutting the foundation ditch lateral wall in wide foundation ditch, and the cost is lower.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. The utility model provides an inner support structure based on shear force wall is support, characterized by: the shear wall comprises a supporting wall (1) built along the side wall of a foundation pit, wherein a plurality of groups of shear walls (2) are vertically arranged in the foundation pit, each shear wall (2) comprises at least three groups of secant piles which are meshed in sequence, the axes of the secant piles of the same group of shear walls (2) are coplanar, and the plane is vertical to the supporting wall (1); a crown beam (11) is poured at the top end of the supporting wall (1), a waist beam (12) is fixed on one side of the supporting wall (1) facing the interior of the foundation pit along the height direction, and a supporting beam (3) which is horizontally arranged is connected between the shear wall (2) and the crown beam (11) and the waist beam (12);
a connecting steel box (23) is embedded in one side, facing the supporting wall (1), of the secant pile close to the supporting wall (1), and the steel bars of the supporting beam (3) are connected with the connecting steel box (23);
the connecting steel box (23) faces one side of the supporting wall (1) and is vertically provided with an insertion groove (231), the insertion groove (231) is provided with a limiting groove (232) parallel to the insertion groove (231) in the length direction along two side walls of the length direction, two ends of the insertion groove (231) and the limiting groove (232) are sealed, and the top ends of the insertion groove (231) and the limiting groove (232) face the direction of the supporting wall (1) and are provided with openings (233).
2. The internal support structure based on a shear wall as a support according to claim 1, wherein: the distances between the shear walls (2) and the supporting walls (1) are equal, and the shear walls (2) are arranged at equal intervals.
3. The internal support structure based on a shear wall as a support according to claim 1, wherein: the shear wall (2) is fixedly sleeved with a plurality of reinforcing hoops (4) along the height direction, and the reinforcing hoops (4) are attached to the outer peripheral surface of the shear wall (2).
4. The internal support structure based on a shear wall as a support according to claim 1, wherein: shear force wall (2) include two sets of first interlock stake (21) and be located between two sets of first interlock stake (21) and with second interlock stake (22) of two sets of first interlock stake (21) interlocks, first steel reinforcement cage (211) have been buried underground in first interlock stake (21), first steel reinforcement cage (211) are close to a lateral axis direction of second interlock stake (22) is sunken to have unfilled corner (212), first interlock stake (21) on the horizontal plane the projection with the projection coincidence of unfilled corner (212).
5. The internal support structure based on a shear wall as a support according to claim 4, wherein: the connecting steel box (23) is fixed with the first reinforcement cage (211).
6. The internal support structure based on a shear wall as a support according to claim 3, wherein: the reinforcing hoops (4) comprise two groups of half hoops (41), and the two groups of half hoops (41) are symmetrically arranged along the plane where the axis of the secant pile of the same shear wall (2) is located.
7. The internal support structure based on a shear wall as a support according to claim 6, wherein: two ends of the two groups of half hoops (41) in the horizontal direction extend out of two ends of the shear wall (2) in the horizontal direction and are connected with split bolts (42) together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010524586.7A CN111648375B (en) | 2020-06-10 | 2020-06-10 | Inner supporting structure based on shear wall as support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010524586.7A CN111648375B (en) | 2020-06-10 | 2020-06-10 | Inner supporting structure based on shear wall as support |
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| Publication Number | Publication Date |
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| CN111648375A CN111648375A (en) | 2020-09-11 |
| CN111648375B true CN111648375B (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010524586.7A Expired - Fee Related CN111648375B (en) | 2020-06-10 | 2020-06-10 | Inner supporting structure based on shear wall as support |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519880A (en) * | 2009-03-02 | 2009-09-02 | 浙江大学 | Method of using rotational multiaxial borehole pouring concrete occluding pile wall for enclosing deep foundation pit and slope protection project |
| CN109811774A (en) * | 2018-06-14 | 2019-05-28 | 江西基良工程机械设备有限公司 | A kind of continuous barricade of deep basal pit and its construction method |
| CN210263068U (en) * | 2018-06-14 | 2020-04-07 | 江西基良工程机械设备有限公司 | Continuous barricade of deep basal pit |
| CN208517950U (en) * | 2018-07-20 | 2019-02-19 | 首钢水城钢铁(集团)赛德建设有限公司 | A kind of novel rotating arm type combination supporting stake |
| KR20180124795A (en) * | 2018-08-22 | 2018-11-21 | 박강호 | An Earth Retaining Wall with Underground Buttresses and A Method of Constructing the same |
| CN210163913U (en) * | 2019-06-12 | 2020-03-20 | 华东交通大学 | Asymmetric double-row pile-anchor rod combined supporting structure |
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2020
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Granted publication date: 20211207 |